Flags at the White House and U.S. Capitol were lowered to half staff Saturday morning to honor the late Rep. John Lewis, who died Friday night at the age of 80 and President Trump ordered all American flags to be lowered nationwide for the rest of the day.

The tribute to signify a nation in mourning is the first of what is expected to be many ways the civil rights leader and longtime congressman from Georgia will be eulogized.It's possible Lewis will lie in state at the Capitol, an honor reserved for American heroes and dignitaries and occurring just 36 times in U.S. history. However, House and Senate leadership have not made such an announcement yet.

"I'm sure it will happen," one senior House Democratic source told Fox News.

By Saturday morning, the American flag at the White House was lowered. Trump, who spent the morning at his golf course in Virginia, didn't tweet about the Georgia Democrat. But he issued a presidential proclamation shortly after 11 a.m. to order all U.S. flags be flown at half-staff at the White House, all public buildings and grounds, all military posts and embassies for the remainder of Saturday to honor Lewis.